How long is the flight from St. Louis to Mexico?

Delta, United Airlines, and American Airlines can get you from St. Louis to Mexico in just under 8h 45m. Your travel time can differ by up to 1h 01m. The distance between St. Louis and Mexico is about 1241 mi. This flight may include one or multiple stops.

What are the cheapest airlines to fly from St. Louis to Mexico one-way?

For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $99. Users have also found prices from $117 and $138 on Delta and Southwest, respectively.

In terms of precipitation, rainfall in Mexico ranges from 0.0 - 4.7 inches per month. July is typically the wettest month, when rainfall can reach 4.7 in. January is typically the driest time to visit Mexico when rainfall is around 0.0 in.

If weather is an important factor for your trip to Mexico, use this chart to help with planning. For those seeking warmer temperatures, May is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 55.4 F).

What are the most popular routes from St. Louis to Mexico?

The most popular route from St. Louis to Mexico is Lambert-St Louis - Cancun. You may also consider Lambert-St Louis - Cozumel or Lambert-St Louis - Puerto Vallarta Ordaz.

What are the most popular airlines that fly from St. Louis to Mexico?

The most popular airlines flying from St. Louis to Mexico are American Airlines, Delta and Southwest. Something to consider prior to booking your flight.

What airport do you fly from for flights from St. Louis to Mexico?

Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Mexico.

Can I find deals for flights from St. Louis to Mexico that include hotel bookings?

Yes. In addition to deals on St. Louis to Mexico flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Mexico?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Mexico.

Can I find deals for business class flights from St. Louis to Mexico?

Yes. Cheapflights offers flight deals from St. Louis to Mexico by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$122+ Flights from St. Louis to Mexico

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Cheap flight deals from St. Louis to Mexico

Cheapest flights from St. Louis to Mexico
Explore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

Sat 12/134:25 pmSTL - CUN

1 stop19h 02mDelta

Thu 12/1811:09 amCUN - STL

1 stop5h 57mDelta

Deal found 12/13

$365

Thu 12/257:20 amSTL - PVR

1 stop8h 55mDelta

Wed 12/313:00 pmPVR - STL

1 stop7h 16mDelta

Deal found 12/13

$380

Wed 12/246:05 amSTL - CUN

1 stop8h 15mDelta

Wed 12/318:00 amCUN - STL

1 stop12h 04mDelta

Deal found 12/13

$389

Mon 12/157:00 amSTL - CUN

1 stop9h 54mAmerican Airlines

Sat 12/2012:33 pmCUN - STL

Nonstop3h 35mAmerican Airlines

Deal found 12/14

$400

Mon 12/227:00 amSTL - CZM

1 stop7h 15mDelta

Wed 12/313:30 pmCZM - STL

1 stop8h 08mDelta

Deal found 12/13

$403

Tue 12/237:00 amSTL - SJD

1 stop8h 10mDelta

Tue 12/301:39 pmSJD - STL

1 stop7h 37mDelta

Deal found 12/13

$404

Wed 12/314:05 pmSTL - CUN

1 stop17h 45mAir Canada

Wed 1/77:25 pmCUN - STL

1 stop21h 04mAir Canada

Deal found 12/15

$407

Mon 12/156:15 amSTL - CUN

1 stop6h 19mUnited Airlines

Sat 12/208:15 amCUN - STL

1 stop10h 39mUnited Airlines

Deal found 12/13

$410

Tue 12/1610:00 amSTL - CUN

2 stops9h 18mUnited Airlines

Sat 12/204:51 pmCUN - STL

1 stop6h 04mUnited Airlines

Deal found 12/13

$414

Wed 12/317:43 pmSTL - CUN

1 stop20h 29mFrontier

Wed 1/712:06 pmCUN - STL

Nonstop3h 21mFrontier

Deal found 12/15

$421

Tue 12/306:00 amSTL - CUN

Nonstop3h 23mFrontier

Tue 12/3012:26 pmCUN - STL

Nonstop3h 21mFrontier

Deal found 12/13

$433

Mon 12/154:05 pmSTL - PVR

1 stop21h 05mAir Canada

Wed 12/172:10 pmPVR - STL

1 stop25h 19mAir Canada

Deal found 12/13

$436

Best flights from St. Louis to Mexico
Discover carefully curated flight deals from St. Louis to Mexico that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 15, 2025.

Wed 1/283:46 pmSTL - MEX

2 stops30h 14mMultiple Airlines

Wed 2/411:10 amMEX - STL

1 stop12h 23mMultiple Airlines

Deal found 12/14

$356

Mon 3/236:10 amSTL - CUN

1 stop9h 05mDelta

Thu 3/264:30 pmCUN - STL

1 stop16h 14mDelta

Deal found 12/12

$371

Tue 1/138:05 amSTL - CUN

2 stops8h 45mUnited Airlines

Fri 1/164:51 pmCUN - STL

1 stop6h 09mUnited Airlines

Deal found 12/12

$371

Mon 1/126:00 amSTL - CUN

1 stop9h 35mAeromexico

Thu 1/151:43 pmCUN - STL

1 stop8h 00mAeromexico

Deal found 12/14

$371

Wed 2/256:47 amSTL - SJD

1 stop9h 46mAmerican Airlines

Tue 3/312:55 pmSJD - STL

1 stop10h 10mAmerican Airlines

Deal found 12/13

$384

Fri 2/276:00 amSTL - CUN

Nonstop3h 30mFrontier

Mon 3/211:42 amCUN - STL

Nonstop3h 27mFrontier

Deal found 12/15

$413

Mon 1/264:05 pmSTL - PVR

1 stop21h 25mAir Canada

Mon 2/25:05 pmPVR - STL

1 stop22h 24mAir Canada

Deal found 12/14

$445

Sat 1/107:00 amSTL - PVR

Nonstop3h 56mAlaska Airlines

Thu 1/295:45 pmPVR - STL

1 stop20h 09mAlaska Airlines

Deal found 12/13

$454

Mon 1/199:59 amSTL - CUN

1 stop5h 36mDelta

Fri 1/308:00 amCUN - STL

1 stop7h 49mDelta

Deal found 12/13

$371

Tue 1/208:05 amSTL - CUN

1 stop6h 30mUnited Airlines

Tue 1/278:39 amCUN - STL

1 stop8h 13mUnited Airlines

Deal found 12/13

$371

Sun 1/119:46 pmSTL - MEX

1 stop19h 24mMultiple Airlines

Fri 1/306:20 amMEX - STL

2 stops17h 13mMultiple Airlines

Deal found 12/13

$384

Sun 4/196:30 amSTL - CUN

1 stop7h 34mDelta

Thu 4/2312:35 pmCUN - STL

1 stop11h 03mDelta

Deal found 12/15

$371

Mon 4/65:12 amSTL - SJD

1 stop10h 36mAmerican Airlines

Fri 4/102:40 pmSJD - STL

1 stop16h 15mAmerican Airlines

Deal found 12/14

$416

Wed 1/286:00 amSTL - SJD

1 stop6h 43mUnited Airlines

Wed 2/412:49 pmSJD - STL

1 stop8h 11mUnited Airlines

Deal found 12/14

$384

Sun 1/119:46 pmSTL - MEX

1 stop22h 24mMultiple Airlines

Mon 2/211:10 amMEX - STL

1 stop12h 23mMultiple Airlines

Deal found 12/13

$389

Sun 2/17:10 amSTL - CUN

1 stop7h 20mDelta

Wed 2/411:18 amCUN - STL

2 stops13h 07mDelta

Deal found 12/14

$371

Wed 2/254:51 pmSTL - MEX

2 stops29h 39mFrontier

Sun 3/18:10 amMEX - STL

1 stop28h 59mFrontier

Deal found 12/12

$458

Tue 1/66:40 pmSTL - PVR

2 stops18h 22mUnited Airlines

Thu 1/151:34 pmPVR - STL

1 stop7h 24mUnited Airlines

Deal found 12/14

$392

Sat 1/316:43 pmSTL - SJD

1 stop18h 44mAmerican Airlines

Sat 2/78:05 amSJD - STL

2 stops13h 54mAmerican Airlines

Deal found 12/13

$438

Sat 1/107:43 pmSTL - MEX

2 stops21h 27mMultiple Airlines

Wed 1/2811:10 amMEX - STL

1 stop12h 23mMultiple Airlines

Deal found 12/13

$406

Sat 1/105:00 pmSTL - CUN

1 stop15h 55mDelta

Tue 1/273:13 pmCUN - STL

1 stop6h 24mDelta

Deal found 12/13

$371

Sun 2/16:00 amSTL - QRO

2 stops15h 21mAeromexico

Thu 2/56:03 amQRO - STL

2 stops17h 34mAeromexico

Deal found 12/13

$509

Mon 1/191:35 pmSTL - GDL

2 stops16h 07mFrontier

Wed 1/216:08 amGDL - STL

1 stop9h 49mFrontier

Deal found 12/14

$466

Fri 1/164:05 pmSTL - GDL

1 stop29h 05mAir Canada

Wed 1/218:40 amGDL - STL

1 stop30h 49mAir Canada

Deal found 12/14

$521

Fri 1/94:49 pmSTL - PVR

2 stops17h 58mUnited Airlines

Fri 1/163:40 pmPVR - STL

1 stop6h 20mUnited Airlines

Deal found 12/13

$392

Thu 3/59:32 amSTL - SJD

1 stop7h 54mAmerican Airlines

Tue 3/101:36 pmSJD - STL

1 stop8h 16mAmerican Airlines

Deal found 12/13

$444

Sat 1/245:04 pmSTL - CUN

1 stop15h 51mDelta

Wed 1/283:13 pmCUN - STL

1 stop6h 24mDelta

Deal found 12/14

$371

Sat 1/107:00 amSTL - PVR

Nonstop3h 56mMultiple Airlines

Sun 2/112:55 pmPVR - STL

3 stops34h 38mMultiple Airlines

Deal found 12/13

$422

Sun 1/181:35 pmSTL - GDL

2 stops16h 07mFrontier

Fri 1/236:08 amGDL - STL

1 stop9h 49mFrontier

Deal found 12/15

$486

Wed 1/146:00 amSTL - BJX

1 stop10h 32mAeromexico

Wed 1/215:50 amBJX - STL

2 stops10h 17mAeromexico

Deal found 12/12

$536

Last-minute flights from St. Louis to Mexico
Discover last-minute flight deals from St. Louis to Mexico. Data last updated December 15, 2025 and is based on user searches.

Tue 1/65:11 pmSTL - CUN

2 stops20h 22mMultiple Airlines

Fri 1/164:12 pmCUN - STL

1 stop15h 39mMultiple Airlines

Deal found 12/14

$303

Wed 1/75:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Fri 1/304:30 pmCUN - STL

1 stop15h 21mMultiple Airlines

Deal found 12/13

$309

Wed 1/75:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Sun 1/1110:13 amCUN - STL

1 stop22h 52mMultiple Airlines

Deal found 12/14

$330

Thu 1/85:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Fri 1/304:30 pmCUN - STL

1 stop15h 21mMultiple Airlines

Deal found 12/13

$300

Sat 1/105:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Mon 2/210:13 amCUN - STL

1 stop14h 20mMultiple Airlines

Deal found 12/13

$321

Sat 1/178:32 pmSTL - CUN

1 stop17h 38mFrontier

Fri 1/304:30 pmCUN - STL

1 stop15h 21mFrontier

Deal found 12/13

$286

Sat 1/178:32 pmSTL - CUN

1 stop17h 38mMultiple Airlines

Thu 1/2910:13 amCUN - STL

1 stop25h 10mMultiple Airlines

Deal found 12/13

$295

Sun 1/185:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Fri 1/234:30 pmCUN - STL

1 stop15h 21mMultiple Airlines

Deal found 12/14

$288

Sun 1/185:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Thu 1/2210:13 amCUN - STL

1 stop25h 10mMultiple Airlines

Deal found 12/14

$297

Sun 1/185:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Tue 1/271:21 pmCUN - STL

2 stops35h 12mMultiple Airlines

Deal found 12/14

$318

Mon 1/198:32 pmSTL - CUN

2 stops14h 44mMultiple Airlines

Fri 1/304:30 pmCUN - STL

1 stop15h 21mMultiple Airlines

Deal found 12/13

$301

Fri 1/235:42 pmSTL - CUN

1 stop14h 31mMultiple Airlines

Fri 1/304:30 pmCUN - STL

1 stop15h 21mMultiple Airlines

Deal found 12/13

$316

One-way flights from St. Louis to Mexico
Search for one-way flight options from St. Louis to Mexico. Find affordable one-way fares based on user searches. Data last updated December 15, 2025.

Sat 1/178:32 pmSTL - CUN

1 stop17h 38mFrontier

Deal found 12/14

$122

Sat 2/288:17 pmSTL - CUN

1 stop16h 20mFrontier

Deal found 12/15

$127

Wed 2/188:17 pmSTL - CUN

1 stop11h 34mFrontier

Deal found 12/15

$129

Wed 2/118:17 pmSTL - CUN

1 stop11h 34mFrontier

Deal found 12/12

$130

Sun 1/185:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Deal found 12/15

$131

Sat 1/318:22 pmSTL - CUN

1 stop17h 58mFrontier

Deal found 12/15

$134

Sat 1/107:43 pmSTL - CUN

1 stop20h 14mFrontier

Deal found 12/15

$136

Thu 1/85:11 pmSTL - CUN

1 stop15h 02mMultiple Airlines

Deal found 12/13

$140

Sun 2/15:42 pmSTL - CUN

1 stop14h 31mMultiple Airlines

Deal found 12/13

$142

Mon 1/198:32 pmSTL - CUN

2 stops14h 44mMultiple Airlines

Deal found 12/15

$148

Sun 1/119:46 pmSTL - MEX

1 stop22h 24mMultiple Airlines

Deal found 12/14

$148

Fri 1/168:32 pmSTL - SJD

1 stop16h 08mFrontier

Deal found 12/15

$159

Find flight deals from St. Louis to Mexico

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$286 (Kiwi.com)
One-way from	$122 (Trip.com)
Popular in	December
Cheapest in	September
Average price	$820
Good round-trip deal	$346 or less
Good one-way deal	$213 or less

Provider with most accurate pricing for Lambert-St Louis-Mexico City Benito Juarez flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Mexico City Benito Juarez flights.

Search Deals

From Lambert-St Louis to Mexico

Search Deals

One-way flight from Lambert-St Louis to Mexico

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($35 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Price to beat on a round-trip flight from Lambert-St Louis to Mexico.

Search Deals

Price to beat on a one-way flight from Lambert-St Louis to Mexico.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMexico City

STL - MEX

STLMEX

Lambert-St Louis

Wed 1/28

3:46 pm-10:00 pm

2 stops30h 14m

Mexico City Benito Juarez

Wed 2/4

11:10 am-11:33 pm

1 stop12h 23m

$356

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 3/23

6:10 am-3:15 pm

1 stop9h 05m

Cancun

Thu 3/26

4:30 pm-8:44 am

1 stop16h 14m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 1/13

8:05 am-5:50 pm

2 stops8h 45m

Cancun

Fri 1/16

4:51 pm-10:00 pm

1 stop6h 09m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 1/12

6:00 am-4:35 pm

1 stop9h 35m

Cancun

Thu 1/15

1:43 pm-8:43 pm

1 stop8h 00m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Mon 1/19

9:59 am-4:35 pm

1 stop5h 36m

Cancun

Fri 1/30

8:00 am-2:49 pm

1 stop7h 49m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Tue 1/20

8:05 am-3:35 pm

1 stop6h 30m

Cancun

Tue 1/27

8:39 am-3:52 pm

1 stop8h 13m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 4/19

6:30 am-2:04 pm

1 stop7h 34m

Cancun

Thu 4/23

12:35 pm-11:38 pm

1 stop11h 03m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sun 2/1

7:10 am-3:30 pm

1 stop7h 20m

Cancun

Wed 2/4

11:18 am-11:25 pm

2 stops13h 07m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 1/10

5:00 pm-9:55 am

1 stop15h 55m

Cancun

Tue 1/27

3:13 pm-8:37 pm

1 stop6h 24m

$371

St. LouisCancún

STL - CUN

STLCUN

Lambert-St Louis

Sat 1/24

5:04 pm-9:55 am

1 stop15h 51m

Cancun

Wed 1/28

3:13 pm-8:37 pm

1 stop6h 24m

$371

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 60 results

...

Best time to book a flight from St. Louis to Mexico

Have a flexible travel schedule? Discover the best time to fly to Mexico from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Mexico

What is the cheapest month to book a flight from St. Louis to Mexico?

Currently, February is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $158). Flying from St. Louis to Mexico in June is currently the most expensive (average of $231). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to MX?

When flying from St. Louis to Mexico, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 20% versus a flight at noon.

What is the cheapest day to fly from St. Louis to Mexico?

Travelers seeking maximum savings on their St. Louis to Mexico flight should consider departing on Sunday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Mexico

Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines from St. Louis to Mexico. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

7.9

Good

4,250 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

United Airlines

7.4

Good

9,094 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,049 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Volaris

6.7

Okay

1,153 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Frontier

5.8

Fair

3,082 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

What airport do you fly from for flights from St. Louis to Mexico?
Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Mexico.
How long is the flight from St. Louis to Mexico?
Delta, United Airlines, and American Airlines can get you from St. Louis to Mexico in just under 8h 45m. Your travel time can differ by up to 1h 01m. The distance between St. Louis and Mexico is about 1241 mi. This flight may include one or multiple stops.
What are the cheapest airlines to fly from St. Louis to Mexico one-way?
For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $99. Users have also found prices from $117 and $138 on Delta and Southwest, respectively.
What are the most popular routes from St. Louis to Mexico?
The most popular route from St. Louis to Mexico is Lambert-St Louis - Cancun. You may also consider Lambert-St Louis - Cozumel or Lambert-St Louis - Puerto Vallarta Ordaz.
Can I find deals for flights from St. Louis to Mexico that include hotel bookings?
Yes. In addition to deals on St. Louis to Mexico flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Mexico?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Mexico.
Can I find deals for business class flights from St. Louis to Mexico?
Yes. Cheapflights offers flight deals from St. Louis to Mexico by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Mexico?
Currently, February is the cheapest month in which you can book a flight from St. Louis to Mexico (average of $158). Flying from St. Louis to Mexico in June is currently the most expensive (average of $231). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 9 airlines flying from St. Louis to Mexico

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$130	Average$293	FlexibilityNo cancel fee	On-time65%
Volaris	Cheapest$175	Average$372	FlexibilityNo cancel fee	On-time79%
Delta	Cheapest$179	Average$587	FlexibilityNo cancel fee	On-timeN/A
Aeromexico	Cheapest$218	Average$536	FlexibilityNo cancel fee	On-timeN/A
Frontier	Cheapest$234	Average$457	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$330	Average$658	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$419	Average$664	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$438	Average$631	FlexibilityNo cancel fee	On-time71%
Alaska Airlines	Cheapest$528	Average$597	FlexibilityNo cancel fee	On-time75%

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$122+ Cheap flights from St. Louis (STL) to Mexico

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/17. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from St. Louis to Mexico

Cheapest flights from St. Louis to MexicoExplore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

Explore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

Find flight deals from St. Louis to Mexico

Keep the following information in mind while searching for St. Louis to Mexico flight deals. Data was last updated December 15, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

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Best time to book a flight from St. Louis to Mexico

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What is the cheapest month to book a flight from St. Louis to Mexico?

What is the cheapest time of day to fly from STL to MX?

Find hourly flight availability from St. Louis to Mexico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

What is the cheapest day to fly from St. Louis to Mexico?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Mexico. Price data was last updated on December 16, 2024.

Reviews of airlines servicing Mexico

Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines from St. Louis to Mexico. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Mexico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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Can I find deals for flights from St. Louis to Mexico that include hotel bookings?

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Can I find deals for business class flights from St. Louis to Mexico?

What is the cheapest month to book a flight from St. Louis to Mexico?

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Alternative routes for St. Louis to Mexico

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Top 9 airlines flying from St. Louis to Mexico

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Cheapest flights from St. Louis to Mexico
Explore the most affordable flight options available from St. Louis to Mexico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.